OS/390
 | This article needs additional citations for verification. (February 2024) |
System/390 | |
| License | Proprietary |
|---|---|
| Succeeded by | z/OS |
| History of IBM mainframe operating systems |
|---|
OS/390 is an
Overview
OS/390 was introduced in late 1995 in an effort to simplify the packaging and ordering for the key, entitled elements needed to complete a fully functional
- Data Facility Storage Management Subsystem Data Facility Product (DFP) – Provides Direct access storage devicesubsystems, printers, tape; provides utilities and program management
- Job Entry Subsystem (JES) – Provides the ability to submit batch work and manage print
- TCP/IPcommunications protocols
An additional benefit of the OS/390 packaging concept was to improve reliability, availability and serviceability (RAS) for the operating system, as the number of different combinations of elements that a customer could order and run was drastically reduced. This reduced the overall time required for customers to test and deploy the operating system in their environments, as well as reducing the number of customer-reported problems, errors (Authorized Program Analysis Reports and Program temporary fixes) arising from the variances in element levels.
In December 2001 IBM extended OS/390 to include support for 64-bit
See also
- OS/360
- MVS
- z/OS
- z/TPF
- z/VM
- z/VSE
- Linux on IBM Z
References
- ^ Alsop, Stewart. "The IBM System/390". IBM. Retrieved February 6, 2024.
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| Server, mainframe | |
| Desktop, workstation | |
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